The epsilon-mechanism in PMS and MS delta Scuti stars

Details The epsilon-mechanism in PMS and MS delta Scuti stars The epsilon-mechanism in PMS and MS delta Scuti stars

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006coast.147...93l&link_type=abstract

Communications in Asteroseismology, vol. 147, p. 93-96

Physics

1

Scientific paper

Delta Scuti type stars are known to pulsate in nonradial low-order p and g modes. These oscillation modes are driven by the so-called kappa-mechanism involving the second helium ionization zone. However, since g modes have significant amplitudes near the stellar core, their excitation might be influenced by the epsilon-mechanism which is associated to the nuclear energy production. We investigate the effect of the epsilon-mechanism on the stability of oscillation modes in 1.5 M(solar) pre-main sequence and main sequence stars.

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